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U2FsdGVkX1//NO5XFGZEv6mq58oSdCRAfaglyhpoI8Ns5yQnX12gwzo/t7ej8kAxYjP0kpXrx/PAOs6mMjonNt3h/ivrLmOZC0H84CDDU6SZctSzTCNXykQf5Xp6wQCYqZ6E0bUKtXI8K7J9gFrY5T040rlGKpXU5CtELljzX3xzJBRfD0oL7wUTwSGZoFiqRV88ov5oVaqyBQohYzhj3qhjldj0ahqEc0noqs52CtjykC9fqH8+kiCG/6jEZwS+zAK8Q0KeWxtA/KsHTUj0BfI4PUBtC47SHFrBqlE/bxipnN3gt88eyLJnxI1PYXbRGloKrht+CFRzLJTzWBDIMPVOKvQSfKhGkrW3hfnPYbxrvmuKGpKjl+sj4OXzkFNp9yWHde4v2zuLtbn5zSmyxIQTwva6QAMVZdwuLYdFoMynQvRVVwcONSmAvv8KzxmZY007qLNam9BKJ7EdSop1f/EoHQHWC2rv++aMpUHFwsREbUaeIHn5I/1YhgHAWZVLlGQUOF0hM+avVSsKB+4L2LqtJowpPKzmK+SqwtQNXolSdYeHdSaWUEA8KPmK3c0hRe9MpbWT5nHqUDX/I9XyWB/TGC9J/962yXCgnYMHkFiaTs1ZkjgB5eSgDAeXgKwFBvu1ODGkVPpuHDU24ViV9SK+IV3LqrbKLYyiiNUEieBbhS+8V4XspBmsBlyKK2eyRD7rTxDoyd3GfrTTRSAvG8469A+WrwFEuw8ittsGOXbSFZI96DwNkUmvkdnyNARw8NHGztMnXMnUik8gIEkW0EJyoCvbT49M/ErGjHXEXo6hSk5EBN+Ufc/3KEWCAJC/OAikBU7lcGP9/SNd4Ymh8VYJjDpkOYOaVTqK6ghD6qE+p2bVjMrlLewEBtDum3Ul1rC1APTZiJOgXWcF7hcNx9ssntyt6GNSCJlfis4r5+17cgMCBkamkg+EasSlL3m8zXdUKVYamZwCdMAh+t2 I5VLgAEe 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Yang Shi wrote: > > > > > > > > On Mon, Jun 3, 2024 at 7:02 AM Oliver Sang > > wrote: > > > > > > > > > > hi, Yang Shi, > > > > > > > > > > On Fri, May 31, 2024 at 01:57:06PM -0700, Yang Shi wrote: > > > > > > Hi Oliver, > > > > > > > > > > > > I just came up with a quick patch (just build test) per the > > discussion > > > > > > and attached, can you please to give it a try? Once it is > > verified, I > > > > > > will refine the patch and submit for review. > > > > > > > > > > what's the base of this patch? I tried to apply it upon efa7df3e3b or > > > > > v6.10-rc2. both failed. > > > > > > > > Its base is mm-unstable. The head commit is 8e06d6b9274d ("mm: add > > > > swappiness= arg to memory.reclaim"). Sorry for the confusion, I should > > > > have mentioned this. > > > > > > I just figured out a bug in the patch. Anyway, we are going to take a > > > different approach to fix the issue per the discussion. I already sent > > > the series to the mailing list. Please refer to > > > > > https://lore.kernel.org/linux-mm/20240604234858.948986-1-yang@os.amperecomputing.com/ > > > > got it. seems you will submit v2? should we wait v2 to do the tests? > > > The real fix is patch #1, that doesn’t need v2. So you just need to test > that. we've finished tests and confirmed patch #1 fixed the issue. we also tested upon patch #2, still clean. our bot applied your patch upon 306dde9ce5c951 as below 5d45cc9b1beb57 mm: gup: do not call try_grab_folio() in slow path fd3fc964468925 mm: page_ref: remove folio_try_get_rcu() 306dde9ce5c951 foo on 306dde9ce5c951, we still observed the issue we reported. clean on both patch #1 and #2 306dde9ce5c9516d fd3fc96446892528af48d6271a3 5d45cc9b1beb57386992c005669 ---------------- --------------------------- --------------------------- fail:runs %reproduction fail:runs %reproduction fail:runs | | | | | 47:50 -94% :50 -94% :50 dmesg.Kernel_panic-not_syncing:Fatal_exception 47:50 -94% :50 -94% :50 dmesg.Oops:invalid_opcode:#[##]KASAN 47:50 -94% :50 -94% :50 dmesg.RIP:try_get_folio 47:50 -94% :50 -94% :50 dmesg.kernel_BUG_at_include/linux/page_ref.h > > For patch #2, I haven’t received any comment yet and I’m going to travel so > I’m not going to submit v2 soon . > > And I heard if hugepd is going to be gone soon, so I may wait for that then > rebase on top of it. Anyway it is just a clean up. > > > > > > > sorry that due to resource constraint, we cannot respond test request very > > quickly now. > > > > > > > > > > > > > > > > > > > > > > > > > > Thanks, > > > > > > Yang > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > Cheers, > > > > > > > > > > > > > > > > David / dhildenb > > > > > > > > > > > > > > > > > > > > > > >